Daniel mcfarlan moore



(No Model.)

' D. MoF. MOORE.

PHOSPHQBESGENT BLEOTRIG LIGHTING BY INTBRRUPTIONS. No. 548,576.- Patented Oct. 22, 1895.

WITNESSES: v INVENTOH NrTnn STATES PATENT Fries.

DANIEL MCFARLAN MOORE, OF NEW YORK, N. Y., ASSIGNOR TO THE MOORE ELECTRICAL COMPANY, OF SAME PLACE.

PHOSPHORESCENT ELECTRlC LIGHTING BY INTERRUPTIONS.

SPECIFICATION forming part of Letters Patent No. 548,576, dated October 22, 1895.

Application filed January 24:, 1895. Serial No. 536,040. (No model.)

To all whom, it ntay concern:

Be it known that I, DANIEL MOFARLAN MOORE, a citizen of the United States, and a resident of New York, county and State of New York, have invented certain new and useful Improvements in Phosphorescent Electric Lighting by Interruptions, (Case No. 23,) of which the following is a specification.

My invention relates to the production of phosphorescent electric light at any distance from an electric interrupter and without the aid of an evacuated space surrounding theinterrupter.

The invention is described by reference to the accompanying drawings.

Figure 1 is a diagram setting forth the details, and Fig. 2 is a modification.

A is a vibrator or circuit-interrupter consisting of terminals B and C, which are relatively vibratory. One 0 has an armature within inductive action of the inductive resistance or magnet I) in series with the terminals B O and with the electric generator D. When the circuit is closed through the vibrator, the current is rapidly alternately closed and interrupted. From the respective terminals are wires which extend to any given distances and are in dependent of return-circuits, except through evacuated inclosures G, which contain conductors H I, connecting, respectively,with the wires E F. During the operation of the vibrator the vacuu m-bulbs become luminous.

The function of the magnetis not only to operate the make-and-break terminals, but it serves as an inductive resistance for the purpose of raising the current of low poten tial from the generator to a current of high potential at the moment of the interruption of the current at the terminals. A self-induced current is thereby produced, and it has a much higher electromotive force-so high, in fact, as to produce light in the lamps.

The vibrator may be replaced by any means which will rapidly and repeatedly interrupt the current, care being taken that a continuous arc does not form between the terminals B and O. For example, the interrupter may consist of a toothed wheel B and spring 0, bearing on the teeth, so that when the wheel is turned the current is broken repeatedly. This wheel B may, of course, be rotated very rapidly. It is found that the more abrupt the break-that is, the less the time that a spark can exist between the terminals-the greater the light up to a certain maximum in the lamps. The object of making the break sudden is to prevent, as far as possible, the formation of an are like that in an arc lamp.

The terminals B O and B 0 need not be in an evacuated inclosure.

I claim as my invention- 1. In a system of phosphorescent electric lighting, the combination with a source of current, of an evacuated inclosure containing 65, conductors connected to said source and a circuit breaker and maker and a self-inductive medium interposed in said circuit for the purpose set forth.

2. In a system of phosphorescent electric 7o lighting, the combination with a source of current, of an evacuated inclosure containing conductors connected to said source, a circuit breaker and maker interposed in said circuit, and a magnet also interposed in said circuit for the operation of said circuit maker and breaker and to act as an inductive resistance for the purpose specified.

3. In a system of phosphorescent electric lighting, the combination with a source of cur- 8o rent, of an evacuated inclosure containing conductors connected to said source, a circuit maker and breaker in a shunt across said circuit, and an inductive resistance coil in said circuit and located to actuate said circuit 8 5 maker and breaker for the purpose specified.

4. A system of phosphorescent electric lighting, consisting of the combination of an electric generator, relatively movable electric terminals and an inductive resistance bothin o circuit with said generator for increasing the electromotive force of the current from said generator, and an evacuated inclosure containing electrodes which are connected to said terminals, which are outside of the said iu- 5 closure. 7

5. A system of phosphorescent electric lighting, consisting of the combination of an electric generator, relatively movable electric terminals and an inductive resistance, both ice in circuit with said generator for increasing the electromotive force of the current from said generator and an evacuated inclosure containing electrodes which are connected to said terminals which are outside of the said inclosure and in series circuit with said resist ance.

6. The combination of a generator of an electric current, an evacuated inclosure c0ntaining electrodes permanently separated by a residual air gap an inductive resistance in series circuit with the electrodes for increasing the electroinotive force of the current from said generator, and a circuit interrupter outside of the vacuum and in shunt circuit to the electrodes and in series circuit with said resistance.

7. A system of phosphorescent electric lighting, consisting of the combination of an electric generator of a current of 10W potential, an evacuated inclosure containing electrodes permanently separated from each other, continuous electric conductors connecting the electrodes to the poles of the said In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 22d day of January, 1895.

D. MCFARLAN MOORE. Witnesses:

A. G. PFAFF, ROBERT S. CHAPPELL. 

